The Dune Hopper is a buggy in Jak 3. It was earned after the mission "Corral wild leapers" and is used primarily to traverse the islets leading to the Monk Temple. It is also used in the "Take out Marauder stronghold" mission, where it was used to cross the bridge as it was missing sections.
The Dune Hopper has a very elongated base frame with heavy metal legs and four flat wheels similar to that of the Tough Puppy. Its multi-jointed independent suspension and spring-mounted chassis allows the Dune Hopper to launch itself into the air to cover large distances, executed by its custom-built jump jets. This also appears to be aided by the buggy's light weight and elongated legs.
It has a large turbo dispenser with the longest and fastest turbo next to the Desert Screamer. Mixed with its turbo and far height, it can traverse almost any distance within the Wasteland, and is not allowed in Kleiver's challenges for that reason. It has possibly the most amount of traction next to the Tough Puppy and the Sand Shark.
The Dune Hopper is not the only vehicle that can reach Monk Temple, as the Desert Screamer is fast and light-weight enough to jump off molten rock piles, letting it fly across the appropriate distance.